From cf50b318d25e3c3328e263df2fcd6e9af192e93e Mon Sep 17 00:00:00 2001
From: John Stilley <jstilley@terrapower.com>
Date: Wed, 17 Dec 2025 13:24:47 -0800
Subject: [PATCH 01/14] Testing SCR troubles

---
 doc/.static/automateScr.py | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/doc/.static/automateScr.py b/doc/.static/automateScr.py
index 79e71f4ea..90e51b6d6 100644
--- a/doc/.static/automateScr.py
+++ b/doc/.static/automateScr.py
@@ -68,8 +68,7 @@ def main():
     prNum = int(args.prNum)
     pastCommit = args.pastCommit
 
-    rstContent = buildScrListing(prNum, pastCommit)
-    print(rstContent)
+    buildScrListing(prNum, pastCommit)
 
 
 def _findOneLineData(lines: list, prNum: str, key: str):
@@ -254,7 +253,10 @@ def buildScrListing(thisPrNum: int, pastCommit: str):
                 content += line
             content += "\n\n"
 
-    return content + "\n\n"
+    content += "\n\n"
+
+    print(content)
+    return content
 
 
 if __name__ == "__main__":

From a3014ca1b1ee84aa37d02b4720f237e8cebc398b Mon Sep 17 00:00:00 2001
From: John Stilley <jstilley@terrapower.com>
Date: Wed, 17 Dec 2025 13:25:52 -0800
Subject: [PATCH 02/14] Trying to speed up testing cycle

---
 .github/workflows/coverage.yaml         | 52 -------------------------
 .github/workflows/docs.yaml             |  4 +-
 .github/workflows/licensechecker.yaml   | 14 -------
 .github/workflows/stale.yaml            | 29 --------------
 .github/workflows/validatemanifest.yaml | 22 -----------
 .github/workflows/wintests.yaml         | 39 -------------------
 6 files changed, 2 insertions(+), 158 deletions(-)
 delete mode 100644 .github/workflows/coverage.yaml
 delete mode 100644 .github/workflows/licensechecker.yaml
 delete mode 100644 .github/workflows/stale.yaml
 delete mode 100644 .github/workflows/validatemanifest.yaml
 delete mode 100644 .github/workflows/wintests.yaml

diff --git a/.github/workflows/coverage.yaml b/.github/workflows/coverage.yaml
deleted file mode 100644
index 8f85dfe09..000000000
--- a/.github/workflows/coverage.yaml
+++ /dev/null
@@ -1,52 +0,0 @@
-name: Coverage
-
-permissions:
-  contents: read
-
-on:
-  push:
-    branches:
-      - main
-    paths-ignore:
-      - 'doc/**'
-  pull_request:
-    paths-ignore:
-      - 'doc/**'
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: true
-
-jobs:
-  build:
-    # Deploying coverage to coveralls.io should not happen on forks
-    if: github.repository == 'terrapower/armi'
-    runs-on: ubuntu-24.04
-    env:
-      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      COVERALLS_REPO_TOKEN: ${{ secrets.COVERALLS_REPO_TOKEN }}
-    steps:
-      - uses: actions/checkout@v2
-      - name: Setup Python
-        uses: actions/setup-python@v2
-        with:
-          python-version: '3.11'
-      - name: Install ARMI and MPI
-        run: |
-          sudo apt-get -y install libopenmpi-dev
-          pip install -e .[memprof,mpi,test]
-      - name: Run Coverage
-        run: |
-          set -x
-          coverage run --rcfile=pyproject.toml -m pytest -n 4 --cov=armi --cov-config=pyproject.toml --cov-report=lcov --ignore=venv armi
-          mpiexec -n 2 --use-hwthread-cpus coverage run --rcfile=pyproject.toml -m pytest --cov=armi --cov-config=pyproject.toml --cov-report=lcov --cov-append --ignore=venv armi/tests/test_mpiFeatures.py || true
-          mpiexec -n 2 --use-hwthread-cpus coverage run --rcfile=pyproject.toml -m pytest --cov=armi --cov-config=pyproject.toml --cov-report=lcov --cov-append --ignore=venv armi/tests/test_mpiParameters.py || true
-          mpiexec -n 2 --use-hwthread-cpus coverage run --rcfile=pyproject.toml -m pytest --cov=armi --cov-config=pyproject.toml --cov-report=lcov --cov-append --ignore=venv armi/tests/test_mpiDirectoryChangers.py || true
-          coverage combine --rcfile=pyproject.toml --keep -a
-          coverage report --rcfile=pyproject.toml -i --skip-empty --skip-covered --sort=cover --fail-under=90
-      - name: Publish to coveralls.io
-        if: github.ref == 'refs/heads/main'
-        uses: coverallsapp/github-action@v2
-        with:
-          github-token: ${{ secrets.GITHUB_TOKEN }}
-          file: coverage.lcov
diff --git a/.github/workflows/docs.yaml b/.github/workflows/docs.yaml
index e4e7c3575..9a490b65e 100644
--- a/.github/workflows/docs.yaml
+++ b/.github/workflows/docs.yaml
@@ -40,9 +40,9 @@ jobs:
           pip install -e .[memprof,mpi,test,docs]
 
           echo "Run unit tests..."
-          pytest --junit-xml=test_results.xml -v -n 4 armi > pytest_verbose.log
+          pytest --junit-xml=test_results.xml -v -n 4 armi/tests/ > pytest_verbose.log
           mpiexec -n 2 --use-hwthread-cpus pytest --junit-xml=test_results_mpi1.xml armi/tests/test_mpiFeatures.py > pytest_verbose_mpi1.log
-          mpiexec -n 2 --use-hwthread-cpus pytest --junit-xml=test_results_mpi2.xml armi/tests/test_mpiParameters.py > pytest_verbose_mpi2.log
+          #mpiexec -n 2 --use-hwthread-cpus pytest --junit-xml=test_results_mpi2.xml armi/tests/test_mpiParameters.py > pytest_verbose_mpi2.log
           mpiexec -n 2 --use-hwthread-cpus pytest --junit-xml=test_results_mpi3.xml armi/utils/tests/test_directoryChangersMpi.py > pytest_verbose_mpi3.log
           python doc/.static/cleanup_test_results.py test_results.xml
 
diff --git a/.github/workflows/licensechecker.yaml b/.github/workflows/licensechecker.yaml
deleted file mode 100644
index e9eea4134..000000000
--- a/.github/workflows/licensechecker.yaml
+++ /dev/null
@@ -1,14 +0,0 @@
-name: Check License Lines
-
-permissions:
-  contents: read
-
-on: [push]
-
-jobs:
-  check-license-lines:
-    runs-on: ubuntu-24.04
-    steps:
-    - uses: actions/checkout@master
-    - name: Check License Lines
-      uses: kt3k/license_checker@v1.0.6
diff --git a/.github/workflows/stale.yaml b/.github/workflows/stale.yaml
deleted file mode 100644
index 2adea167e..000000000
--- a/.github/workflows/stale.yaml
+++ /dev/null
@@ -1,29 +0,0 @@
-# This workflow warns and then closes PRs that have had no activity for a specified amount of time.
-#
-# You can adjust the behavior by modifying this file.
-# For more information, see: https://github.com/actions/stale
-name: Mark Stale PRs
-
-on:
-  schedule:
-  # once a day at 3:14 AM
-  - cron: '14 3 * * *'
-
-permissions:
-  pull-requests: write
-
-jobs:
-  stale:
-    # This workflow is not designed to make sense on forks
-    if: github.repository == 'terrapower/armi'
-    runs-on: ubuntu-24.04
-    steps:
-      - uses: actions/stale@v8
-        with:
-          repo-token: ${{ secrets.GITHUB_TOKEN }}
-          stale-pr-message: "This pull request has been automatically marked as stale because it has not had any activity in the last 100 days. It will be closed in 7 days if no further activity occurs. Thank you for your contributions."
-          stale-pr-label: "stale"
-          days-before-pr-stale: 100
-          days-before-pr-close: 7
-          days-before-issue-stale: -1
-          operations-per-run: 100
\ No newline at end of file
diff --git a/.github/workflows/validatemanifest.yaml b/.github/workflows/validatemanifest.yaml
deleted file mode 100644
index 23f227610..000000000
--- a/.github/workflows/validatemanifest.yaml
+++ /dev/null
@@ -1,22 +0,0 @@
-name: Validate Manifest
-
-permissions:
-  contents: read
-
-on: [push]
-
-jobs:
-  build:
-
-    runs-on: ubuntu-24.04
-
-    steps:
-      - uses: actions/checkout@v2
-      - name: Setup Python
-        uses: actions/setup-python@v2
-        with:
-          python-version: '3.11'
-      - name: Validate Manifest
-        run: |
-          pip install toml
-          python .github/workflows/validatemanifest.py
diff --git a/.github/workflows/wintests.yaml b/.github/workflows/wintests.yaml
deleted file mode 100644
index e9131aff8..000000000
--- a/.github/workflows/wintests.yaml
+++ /dev/null
@@ -1,39 +0,0 @@
-name: ARMI Windows tests
-
-permissions:
-  contents: read
-
-on:
-  push:
-    branches:
-      - main
-    paths-ignore:
-      - 'doc/**'
-  pull_request:
-    paths-ignore:
-      - 'doc/**'
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: true
-
-jobs:
-  build:
-
-    runs-on: windows-2022
-
-    steps:
-      - uses: actions/checkout@v2
-      - name: Setup Python
-        uses: actions/setup-python@v2
-        with:
-          python-version: '3.11'
-      - name: Upgrade PIP
-        run: python -m pip install --upgrade pip
-      - name: Run Unit Tests on Windows
-        run: |
-          pip install mpi4py==3.1.6
-          pip install -e .[memprof,mpi,test]
-          pytest -n 4 armi
-      - name: Find Test Crumbs
-        run: python .github/workflows/find_test_crumbs.py

From d7e9c7011365c7f28ba2fcadd814e682a169b6af Mon Sep 17 00:00:00 2001
From: John Stilley <jstilley@terrapower.com>
Date: Wed, 17 Dec 2025 13:27:06 -0800
Subject: [PATCH 03/14] Trying to speed up testing cycle

---
 .github/workflows/linting.yaml   | 24 --------------------
 .github/workflows/mac_tests.yaml | 37 ------------------------------
 .github/workflows/unittests.yaml | 39 --------------------------------
 3 files changed, 100 deletions(-)
 delete mode 100644 .github/workflows/linting.yaml
 delete mode 100644 .github/workflows/mac_tests.yaml
 delete mode 100644 .github/workflows/unittests.yaml

diff --git a/.github/workflows/linting.yaml b/.github/workflows/linting.yaml
deleted file mode 100644
index 6037e5b1e..000000000
--- a/.github/workflows/linting.yaml
+++ /dev/null
@@ -1,24 +0,0 @@
-name: Linting
-
-permissions:
-  contents: read
-
-on: [push]
-
-jobs:
-  build:
-
-    runs-on: ubuntu-24.04
-
-    steps:
-      - uses: actions/checkout@v4
-      - name: Setup Python
-        uses: actions/setup-python@v5
-        with:
-          python-version: '3.13'
-      - name: Run Linter
-        run:  |
-          set -x
-          pip install -e .[test]
-          ruff format --check .
-          ruff check .
diff --git a/.github/workflows/mac_tests.yaml b/.github/workflows/mac_tests.yaml
deleted file mode 100644
index fc2b0f85a..000000000
--- a/.github/workflows/mac_tests.yaml
+++ /dev/null
@@ -1,37 +0,0 @@
-name: ARMI MacOS Tests
-
-permissions:
-  contents: read
-
-on:
-  push:
-    branches:
-      - main
-    paths-ignore:
-      - 'doc/**'
-  pull_request:
-    paths-ignore:
-      - 'doc/**'
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: true
-
-jobs:
-  build:
-
-    runs-on: macos-14
-
-    steps:
-      - uses: actions/checkout@v2
-      - name: Setup Python
-        uses: actions/setup-python@v2
-        with:
-          python-version: '3.11'
-      - name: Upgrade PIP
-        run: python -m pip install --upgrade pip
-      - name: Run Unit Tests on MacOS
-        run: |
-          brew install openmpi
-          pip install -e .[memprof,mpi,test]
-          pytest -n 4 armi
diff --git a/.github/workflows/unittests.yaml b/.github/workflows/unittests.yaml
deleted file mode 100644
index db5efba5d..000000000
--- a/.github/workflows/unittests.yaml
+++ /dev/null
@@ -1,39 +0,0 @@
-name: ARMI unit tests
-
-permissions:
-  contents: read
-
-on:
-  push:
-    paths-ignore:
-      - 'doc/**'
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: true
-
-jobs:
-  build:
-
-    runs-on: ubuntu-24.04
-    strategy:
-      matrix:
-        python: [3.9, '3.10', '3.11', '3.12', '3.13']
-
-    steps:
-      - uses: actions/checkout@v4
-      - name: Setup Python
-        uses: actions/setup-python@v5
-        with:
-          python-version: ${{ matrix.python }}
-          allow-prereleases: true
-      - name: Install mpi libs
-        run: sudo apt-get -y install libopenmpi-dev
-      - name: Run Tests
-        run: |
-          set -x
-          pip install -e .[memprof,mpi,test]
-          pytest -n 4 armi
-          mpiexec -n 2 --use-hwthread-cpus pytest armi/tests/test_mpiFeatures.py
-          mpiexec -n 2 --use-hwthread-cpus pytest armi/tests/test_mpiParameters.py
-          mpiexec -n 2 --use-hwthread-cpus pytest armi/utils/tests/test_directoryChangersMpi.py

From a13b8321ebb3e8fabb1566e82572e35076a1d061 Mon Sep 17 00:00:00 2001
From: John Stilley <jstilley@terrapower.com>
Date: Wed, 17 Dec 2025 13:38:36 -0800
Subject: [PATCH 04/14] reverting doc changes for testing

---
 .github/workflows/docs.yaml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/docs.yaml b/.github/workflows/docs.yaml
index 9a490b65e..e4e7c3575 100644
--- a/.github/workflows/docs.yaml
+++ b/.github/workflows/docs.yaml
@@ -40,9 +40,9 @@ jobs:
           pip install -e .[memprof,mpi,test,docs]
 
           echo "Run unit tests..."
-          pytest --junit-xml=test_results.xml -v -n 4 armi/tests/ > pytest_verbose.log
+          pytest --junit-xml=test_results.xml -v -n 4 armi > pytest_verbose.log
           mpiexec -n 2 --use-hwthread-cpus pytest --junit-xml=test_results_mpi1.xml armi/tests/test_mpiFeatures.py > pytest_verbose_mpi1.log
-          #mpiexec -n 2 --use-hwthread-cpus pytest --junit-xml=test_results_mpi2.xml armi/tests/test_mpiParameters.py > pytest_verbose_mpi2.log
+          mpiexec -n 2 --use-hwthread-cpus pytest --junit-xml=test_results_mpi2.xml armi/tests/test_mpiParameters.py > pytest_verbose_mpi2.log
           mpiexec -n 2 --use-hwthread-cpus pytest --junit-xml=test_results_mpi3.xml armi/utils/tests/test_directoryChangersMpi.py > pytest_verbose_mpi3.log
           python doc/.static/cleanup_test_results.py test_results.xml
 

From 9b2dfce4f73c45e06bd15ef6f22bbc5908633019 Mon Sep 17 00:00:00 2001
From: John Stilley <jstilley@terrapower.com>
Date: Mon, 5 Jan 2026 11:06:20 -0800
Subject: [PATCH 05/14] why are the tests failing?

---
 .github/workflows/docs.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/docs.yaml b/.github/workflows/docs.yaml
index e4e7c3575..be5464286 100644
--- a/.github/workflows/docs.yaml
+++ b/.github/workflows/docs.yaml
@@ -40,7 +40,7 @@ jobs:
           pip install -e .[memprof,mpi,test,docs]
 
           echo "Run unit tests..."
-          pytest --junit-xml=test_results.xml -v -n 4 armi > pytest_verbose.log
+          python -m pytest --junit-xml=test_results.xml -v -n 4 armi/tests > pytest_verbose.log
           mpiexec -n 2 --use-hwthread-cpus pytest --junit-xml=test_results_mpi1.xml armi/tests/test_mpiFeatures.py > pytest_verbose_mpi1.log
           mpiexec -n 2 --use-hwthread-cpus pytest --junit-xml=test_results_mpi2.xml armi/tests/test_mpiParameters.py > pytest_verbose_mpi2.log
           mpiexec -n 2 --use-hwthread-cpus pytest --junit-xml=test_results_mpi3.xml armi/utils/tests/test_directoryChangersMpi.py > pytest_verbose_mpi3.log

From f2e822f01db5917b787779b7eb91577f40739d41 Mon Sep 17 00:00:00 2001
From: John Stilley <jstilley@terrapower.com>
Date: Mon, 5 Jan 2026 11:10:20 -0800
Subject: [PATCH 06/14] bumping action versions

---
 .github/workflows/docs.yaml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/docs.yaml b/.github/workflows/docs.yaml
index be5464286..5d6fe2251 100644
--- a/.github/workflows/docs.yaml
+++ b/.github/workflows/docs.yaml
@@ -17,9 +17,9 @@ jobs:
     runs-on: ubuntu-22.04
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Setup Python
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v5
         with:
           python-version: 3.13
       - name: Update package index

From 2645e4bbbc6e088676d4c9a37422745122d0780b Mon Sep 17 00:00:00 2001
From: John Stilley <jstilley@terrapower.com>
Date: Mon, 5 Jan 2026 11:24:10 -0800
Subject: [PATCH 07/14] Does the doc build fail without the other YAML
 files????

---
 .github/workflows/coverage.yaml         | 52 +++++++++++++++++++++++++
 .github/workflows/licensechecker.yaml   | 14 +++++++
 .github/workflows/linting.yaml          | 24 ++++++++++++
 .github/workflows/mac_tests.yaml        | 37 ++++++++++++++++++
 .github/workflows/stale.yaml            | 29 ++++++++++++++
 .github/workflows/unittests.yaml        | 39 +++++++++++++++++++
 .github/workflows/validatemanifest.yaml | 22 +++++++++++
 .github/workflows/wintests.yaml         | 39 +++++++++++++++++++
 8 files changed, 256 insertions(+)
 create mode 100644 .github/workflows/coverage.yaml
 create mode 100644 .github/workflows/licensechecker.yaml
 create mode 100644 .github/workflows/linting.yaml
 create mode 100644 .github/workflows/mac_tests.yaml
 create mode 100644 .github/workflows/stale.yaml
 create mode 100644 .github/workflows/unittests.yaml
 create mode 100644 .github/workflows/validatemanifest.yaml
 create mode 100644 .github/workflows/wintests.yaml

diff --git a/.github/workflows/coverage.yaml b/.github/workflows/coverage.yaml
new file mode 100644
index 000000000..8f85dfe09
--- /dev/null
+++ b/.github/workflows/coverage.yaml
@@ -0,0 +1,52 @@
+name: Coverage
+
+permissions:
+  contents: read
+
+on:
+  push:
+    branches:
+      - main
+    paths-ignore:
+      - 'doc/**'
+  pull_request:
+    paths-ignore:
+      - 'doc/**'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build:
+    # Deploying coverage to coveralls.io should not happen on forks
+    if: github.repository == 'terrapower/armi'
+    runs-on: ubuntu-24.04
+    env:
+      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      COVERALLS_REPO_TOKEN: ${{ secrets.COVERALLS_REPO_TOKEN }}
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: '3.11'
+      - name: Install ARMI and MPI
+        run: |
+          sudo apt-get -y install libopenmpi-dev
+          pip install -e .[memprof,mpi,test]
+      - name: Run Coverage
+        run: |
+          set -x
+          coverage run --rcfile=pyproject.toml -m pytest -n 4 --cov=armi --cov-config=pyproject.toml --cov-report=lcov --ignore=venv armi
+          mpiexec -n 2 --use-hwthread-cpus coverage run --rcfile=pyproject.toml -m pytest --cov=armi --cov-config=pyproject.toml --cov-report=lcov --cov-append --ignore=venv armi/tests/test_mpiFeatures.py || true
+          mpiexec -n 2 --use-hwthread-cpus coverage run --rcfile=pyproject.toml -m pytest --cov=armi --cov-config=pyproject.toml --cov-report=lcov --cov-append --ignore=venv armi/tests/test_mpiParameters.py || true
+          mpiexec -n 2 --use-hwthread-cpus coverage run --rcfile=pyproject.toml -m pytest --cov=armi --cov-config=pyproject.toml --cov-report=lcov --cov-append --ignore=venv armi/tests/test_mpiDirectoryChangers.py || true
+          coverage combine --rcfile=pyproject.toml --keep -a
+          coverage report --rcfile=pyproject.toml -i --skip-empty --skip-covered --sort=cover --fail-under=90
+      - name: Publish to coveralls.io
+        if: github.ref == 'refs/heads/main'
+        uses: coverallsapp/github-action@v2
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          file: coverage.lcov
diff --git a/.github/workflows/licensechecker.yaml b/.github/workflows/licensechecker.yaml
new file mode 100644
index 000000000..e9eea4134
--- /dev/null
+++ b/.github/workflows/licensechecker.yaml
@@ -0,0 +1,14 @@
+name: Check License Lines
+
+permissions:
+  contents: read
+
+on: [push]
+
+jobs:
+  check-license-lines:
+    runs-on: ubuntu-24.04
+    steps:
+    - uses: actions/checkout@master
+    - name: Check License Lines
+      uses: kt3k/license_checker@v1.0.6
diff --git a/.github/workflows/linting.yaml b/.github/workflows/linting.yaml
new file mode 100644
index 000000000..6037e5b1e
--- /dev/null
+++ b/.github/workflows/linting.yaml
@@ -0,0 +1,24 @@
+name: Linting
+
+permissions:
+  contents: read
+
+on: [push]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-24.04
+
+    steps:
+      - uses: actions/checkout@v4
+      - name: Setup Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.13'
+      - name: Run Linter
+        run:  |
+          set -x
+          pip install -e .[test]
+          ruff format --check .
+          ruff check .
diff --git a/.github/workflows/mac_tests.yaml b/.github/workflows/mac_tests.yaml
new file mode 100644
index 000000000..fc2b0f85a
--- /dev/null
+++ b/.github/workflows/mac_tests.yaml
@@ -0,0 +1,37 @@
+name: ARMI MacOS Tests
+
+permissions:
+  contents: read
+
+on:
+  push:
+    branches:
+      - main
+    paths-ignore:
+      - 'doc/**'
+  pull_request:
+    paths-ignore:
+      - 'doc/**'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build:
+
+    runs-on: macos-14
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: '3.11'
+      - name: Upgrade PIP
+        run: python -m pip install --upgrade pip
+      - name: Run Unit Tests on MacOS
+        run: |
+          brew install openmpi
+          pip install -e .[memprof,mpi,test]
+          pytest -n 4 armi
diff --git a/.github/workflows/stale.yaml b/.github/workflows/stale.yaml
new file mode 100644
index 000000000..2adea167e
--- /dev/null
+++ b/.github/workflows/stale.yaml
@@ -0,0 +1,29 @@
+# This workflow warns and then closes PRs that have had no activity for a specified amount of time.
+#
+# You can adjust the behavior by modifying this file.
+# For more information, see: https://github.com/actions/stale
+name: Mark Stale PRs
+
+on:
+  schedule:
+  # once a day at 3:14 AM
+  - cron: '14 3 * * *'
+
+permissions:
+  pull-requests: write
+
+jobs:
+  stale:
+    # This workflow is not designed to make sense on forks
+    if: github.repository == 'terrapower/armi'
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/stale@v8
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          stale-pr-message: "This pull request has been automatically marked as stale because it has not had any activity in the last 100 days. It will be closed in 7 days if no further activity occurs. Thank you for your contributions."
+          stale-pr-label: "stale"
+          days-before-pr-stale: 100
+          days-before-pr-close: 7
+          days-before-issue-stale: -1
+          operations-per-run: 100
\ No newline at end of file
diff --git a/.github/workflows/unittests.yaml b/.github/workflows/unittests.yaml
new file mode 100644
index 000000000..db5efba5d
--- /dev/null
+++ b/.github/workflows/unittests.yaml
@@ -0,0 +1,39 @@
+name: ARMI unit tests
+
+permissions:
+  contents: read
+
+on:
+  push:
+    paths-ignore:
+      - 'doc/**'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build:
+
+    runs-on: ubuntu-24.04
+    strategy:
+      matrix:
+        python: [3.9, '3.10', '3.11', '3.12', '3.13']
+
+    steps:
+      - uses: actions/checkout@v4
+      - name: Setup Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python }}
+          allow-prereleases: true
+      - name: Install mpi libs
+        run: sudo apt-get -y install libopenmpi-dev
+      - name: Run Tests
+        run: |
+          set -x
+          pip install -e .[memprof,mpi,test]
+          pytest -n 4 armi
+          mpiexec -n 2 --use-hwthread-cpus pytest armi/tests/test_mpiFeatures.py
+          mpiexec -n 2 --use-hwthread-cpus pytest armi/tests/test_mpiParameters.py
+          mpiexec -n 2 --use-hwthread-cpus pytest armi/utils/tests/test_directoryChangersMpi.py
diff --git a/.github/workflows/validatemanifest.yaml b/.github/workflows/validatemanifest.yaml
new file mode 100644
index 000000000..23f227610
--- /dev/null
+++ b/.github/workflows/validatemanifest.yaml
@@ -0,0 +1,22 @@
+name: Validate Manifest
+
+permissions:
+  contents: read
+
+on: [push]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-24.04
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: '3.11'
+      - name: Validate Manifest
+        run: |
+          pip install toml
+          python .github/workflows/validatemanifest.py
diff --git a/.github/workflows/wintests.yaml b/.github/workflows/wintests.yaml
new file mode 100644
index 000000000..e9131aff8
--- /dev/null
+++ b/.github/workflows/wintests.yaml
@@ -0,0 +1,39 @@
+name: ARMI Windows tests
+
+permissions:
+  contents: read
+
+on:
+  push:
+    branches:
+      - main
+    paths-ignore:
+      - 'doc/**'
+  pull_request:
+    paths-ignore:
+      - 'doc/**'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build:
+
+    runs-on: windows-2022
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: '3.11'
+      - name: Upgrade PIP
+        run: python -m pip install --upgrade pip
+      - name: Run Unit Tests on Windows
+        run: |
+          pip install mpi4py==3.1.6
+          pip install -e .[memprof,mpi,test]
+          pytest -n 4 armi
+      - name: Find Test Crumbs
+        run: python .github/workflows/find_test_crumbs.py

From 033c1eeaba32f2c47eb0e14c861f83e81e33db2b Mon Sep 17 00:00:00 2001
From: John Stilley <jstilley@terrapower.com>
Date: Mon, 5 Jan 2026 11:30:01 -0800
Subject: [PATCH 08/14] ruamel.yaml troubles

---
 pyproject.toml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pyproject.toml b/pyproject.toml
index c1ec04211..7996d2261 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -40,7 +40,7 @@ dependencies = [
     "pluggy>=1.2.0", # Central tool behind the ARMI Plugin system
     "pyDOE>=0.3.8", # We import a Latin-hypercube algorithm to explore a phase space
     "pyevtk>=1.2.0", # Handles binary VTK visualization files
-    "ruamel.yaml ; python_version >= '3.11.0'", # Our foundational YAML library
+    "ruamel.yaml<0.19.0 ; python_version >= '3.11.0'", # Our foundational YAML library
     "ruamel.yaml.clib ; python_version >= '3.11.0'", # C-based core of ruamel below
     "ruamel.yaml.clib<=0.2.7 ; python_version < '3.11.0'", # C-based core of ruamel below
     "ruamel.yaml<=0.17.21 ; python_version < '3.11.0'", # Our foundational YAML library

From 6dfdedbd22c4f8c265a39072efccc45bf4c61351 Mon Sep 17 00:00:00 2001
From: John Stilley <jstilley@terrapower.com>
Date: Mon, 5 Jan 2026 12:03:39 -0800
Subject: [PATCH 09/14] Fixing broken gallery item

---
 doc/gallery-src/framework/run_blockVolumeFractions.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/gallery-src/framework/run_blockVolumeFractions.py b/doc/gallery-src/framework/run_blockVolumeFractions.py
index fbd4d3918..583d284a1 100644
--- a/doc/gallery-src/framework/run_blockVolumeFractions.py
+++ b/doc/gallery-src/framework/run_blockVolumeFractions.py
@@ -54,6 +54,7 @@ def plotVolFracsWithComponentTemps(b, uniformTemps):
     initialVols = {}
     relativeVols = collections.defaultdict(list)
     for tempInC in uniformTemps:
+        print(f"tempInC:   {tempInC}")
         print(f"Updating fuel/structure components to {tempInC} °C")
         # Modify the fuel/structure components to the same uniform temperature
         for c in componentsToModify:
@@ -83,7 +84,7 @@ def plotVolFracsWithComponentTemps(b, uniformTemps):
     plt.show()
 
 
-uniformTempsInC = [400.0, 500.0, 600.0, 700.0, 800.0, 900.0, 1200.0]
+uniformTempsInC = [300.0, 400.0, 500.0, 600.0, 700.0]
 b = buildSimpleFuelBlock()
 
 writeInitialVolumeFractions(b)

From 62eadd0e7955c148b87a6c5e0b3a7a34f5c26642 Mon Sep 17 00:00:00 2001
From: John Stilley <jstilley@terrapower.com>
Date: Mon, 5 Jan 2026 13:54:12 -0800
Subject: [PATCH 10/14] removing crumbs

---
 doc/gallery-src/framework/run_blockVolumeFractions.py | 1 -
 1 file changed, 1 deletion(-)

diff --git a/doc/gallery-src/framework/run_blockVolumeFractions.py b/doc/gallery-src/framework/run_blockVolumeFractions.py
index 583d284a1..c623bb6b9 100644
--- a/doc/gallery-src/framework/run_blockVolumeFractions.py
+++ b/doc/gallery-src/framework/run_blockVolumeFractions.py
@@ -54,7 +54,6 @@ def plotVolFracsWithComponentTemps(b, uniformTemps):
     initialVols = {}
     relativeVols = collections.defaultdict(list)
     for tempInC in uniformTemps:
-        print(f"tempInC:   {tempInC}")
         print(f"Updating fuel/structure components to {tempInC} °C")
         # Modify the fuel/structure components to the same uniform temperature
         for c in componentsToModify:

From 472f179d4ee5720e528df4f48045e7acd5385694 Mon Sep 17 00:00:00 2001
From: John Stilley <jstilley@terrapower.com>
Date: Mon, 5 Jan 2026 15:22:36 -0800
Subject: [PATCH 11/14] refactoring script

---
 doc/.static/automateScr.py     | 20 ++++++++++++--------
 doc/qa_docs/scr/latest_scr.rst |  2 +-
 2 files changed, 13 insertions(+), 9 deletions(-)

diff --git a/doc/.static/automateScr.py b/doc/.static/automateScr.py
index 90e51b6d6..923a42a71 100644
--- a/doc/.static/automateScr.py
+++ b/doc/.static/automateScr.py
@@ -60,15 +60,17 @@ def main():
     parser = argparse.ArgumentParser(description="An ARMI custom doc tool to build the SCR for this release.")
 
     # Required positional argument
-    parser.add_argument("prNum", type=int, help="The current PR number (use -1 if there is no PR).")
     parser.add_argument("pastCommit", help="The commit hash of the last release.")
+    parser.add_argument(
+        "prNum", nargs="?", type=int, default=-1, help="The current PR number (use -1 if there is no PR)."
+    )
 
     # Parse the command line
     args = parser.parse_args()
-    prNum = int(args.prNum)
     pastCommit = args.pastCommit
+    prNum = int(args.prNum)
 
-    buildScrListing(prNum, pastCommit)
+    buildScrListing(pastCommit, prNum)
 
 
 def _findOneLineData(lines: list, prNum: str, key: str):
@@ -109,6 +111,7 @@ def _buildScrLine(prNum: str):
     str
         RST-formatted list item.
     """
+    print(prNum)
     txt = subprocess.check_output(["gh", "pr", "view", prNum]).decode("utf-8")
     lines = [ln.strip() for ln in txt.split("\n") if ln.strip()]
 
@@ -187,16 +190,16 @@ def isMainPR(prNum: int):
         return True
 
 
-def buildScrListing(thisPrNum: int, pastCommit: str):
+def buildScrListing(pastCommit: str, thisPrNum: int = -1):
     """Helper method to build an RST-formatted lists of all SCRs, by category.
 
     Parameters
     ----------
-    thisPrNum : int
-        The number of this PR. If this is not a PR, this is a -1.
     pastCommit : str
-        The shortened commit hash for a past reference commit. (This is the last commit of the last
-        release. It will not be included.)
+        The shortened commit hash for a past reference commit. (This is the last commit of the last release. It will not
+        be included.)
+    thisPrNum : int
+        The number of this PR. If this is not a PR, the default is -1.
 
     Returns
     -------
@@ -236,6 +239,7 @@ def buildScrListing(thisPrNum: int, pastCommit: str):
 
     # 3. Build a list for each SCR
     data = {"docs": [], "features": [], "fixes": [], "trivial": []}
+    print(sorted(prNums))
     for prNum in sorted(prNums):
         if not isMainPR(prNum):
             continue
diff --git a/doc/qa_docs/scr/latest_scr.rst b/doc/qa_docs/scr/latest_scr.rst
index 675c45417..174c4a278 100644
--- a/doc/qa_docs/scr/latest_scr.rst
+++ b/doc/qa_docs/scr/latest_scr.rst
@@ -17,4 +17,4 @@ The following lists display all the SCRs in this release of the ARMI framework.
    from automateScr import buildScrListing
 
    thisPrNum = int(os.environ.get('PR_NUMBER', -1) or -1)
-   return buildScrListing(thisPrNum, "95d94a4d")
+   return buildScrListing("95d94a4d", thisPrNum)

From 25f4dbff9499901a8a529f5b2f1a9a0cfdd518d5 Mon Sep 17 00:00:00 2001
From: John Stilley <jstilley@terrapower.com>
Date: Mon, 5 Jan 2026 15:55:53 -0800
Subject: [PATCH 12/14] Fixing PR_NUMBER for main

---
 .github/workflows/docs.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/docs.yaml b/.github/workflows/docs.yaml
index 5d6fe2251..daac00184 100644
--- a/.github/workflows/docs.yaml
+++ b/.github/workflows/docs.yaml
@@ -32,7 +32,7 @@ jobs:
         continue-on-error: true
         env:
           GH_TOKEN: ${{ github.token }}
-          PR_NUMBER: ${{ github.event.number }}
+          PR_NUMBER: ${{ github.ref == 'refs/heads/main' && -1 || github.event.number }}
         run: |
           echo "Installing ARMI..."
           set -x

From 85b91188866182149e455bfcac0fe7f323c14a5a Mon Sep 17 00:00:00 2001
From: John Stilley <jstilley@terrapower.com>
Date: Tue, 6 Jan 2026 09:56:07 -0800
Subject: [PATCH 13/14] cleaning up dev crumbs

---
 .github/workflows/docs.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/docs.yaml b/.github/workflows/docs.yaml
index daac00184..88c09bf20 100644
--- a/.github/workflows/docs.yaml
+++ b/.github/workflows/docs.yaml
@@ -40,7 +40,7 @@ jobs:
           pip install -e .[memprof,mpi,test,docs]
 
           echo "Run unit tests..."
-          python -m pytest --junit-xml=test_results.xml -v -n 4 armi/tests > pytest_verbose.log
+          pytest --junit-xml=test_results.xml -v -n 4 armi > pytest_verbose.log
           mpiexec -n 2 --use-hwthread-cpus pytest --junit-xml=test_results_mpi1.xml armi/tests/test_mpiFeatures.py > pytest_verbose_mpi1.log
           mpiexec -n 2 --use-hwthread-cpus pytest --junit-xml=test_results_mpi2.xml armi/tests/test_mpiParameters.py > pytest_verbose_mpi2.log
           mpiexec -n 2 --use-hwthread-cpus pytest --junit-xml=test_results_mpi3.xml armi/utils/tests/test_directoryChangersMpi.py > pytest_verbose_mpi3.log

From 266a393b8937eef7abc4db5cb2e57ef00749533f Mon Sep 17 00:00:00 2001
From: John Stilley <1831479+john-science@users.noreply.github.com>
Date: Tue, 6 Jan 2026 15:10:12 -0800
Subject: [PATCH 14/14] Arrielle pointed out my dev print statements. Thanks!

---
 doc/.static/automateScr.py | 2 --
 1 file changed, 2 deletions(-)

diff --git a/doc/.static/automateScr.py b/doc/.static/automateScr.py
index 923a42a71..4faf4db22 100644
--- a/doc/.static/automateScr.py
+++ b/doc/.static/automateScr.py
@@ -111,7 +111,6 @@ def _buildScrLine(prNum: str):
     str
         RST-formatted list item.
     """
-    print(prNum)
     txt = subprocess.check_output(["gh", "pr", "view", prNum]).decode("utf-8")
     lines = [ln.strip() for ln in txt.split("\n") if ln.strip()]
 
@@ -239,7 +238,6 @@ def buildScrListing(pastCommit: str, thisPrNum: int = -1):
 
     # 3. Build a list for each SCR
     data = {"docs": [], "features": [], "fixes": [], "trivial": []}
-    print(sorted(prNums))
     for prNum in sorted(prNums):
         if not isMainPR(prNum):
             continue